jQuery if form field's part of value matches values in array, then

Question

I want my email form filed to be validated by jQuery.

if user typed val() matches any values in array, i want to run some function before submitting.

ex. if I type

abc.com is not in array. so OK.

bbb.net is in array. so NG.

username@ccc.co.uk part of string is in array. so NG.

blah@aaa.ne. i do not care... let PHP decide if its valid email. so javascriptly OK.

html:

<form action="./" method="post" id="test">
email address: <input type="text" id="mail">

<input type="submit" val="SUBMIT " id="subm">
</form>

javascript:

var arr = [
'aaa.ne.jp', 'bbb.net', 'ccc.co.uk', 'ddd.co.kr'
];

$('#test').on('submit', function() {
var _value = $('#mail').val();
if( $.inArray(_value, arr) > 0 || _value == '') {
    console.log(_value + '　cant be accepted');
    return false;
} else {
    console.log(_value + ' is GO!');
    return false;//do not submit just for the sake of example.
}
});

JSFIDDLE

i used jquery's inArray() method, but somehow ,for example, username@ccc.co.uk gets through the validation even though ccc.co.uk is in array.

any solution will be appreciated. thanx.

Answer 1

Try splitting the email and compare the latter part after @

var arr = [
    'aaa.ne.jp', 'bbb.net', 'ccc.co.uk', 'ddd.co.kr'];

$('#test').on('submit', function () {
    var _value = $('#mail').val();
    if (_value !== '' && _value.indexOf('@') > -1) {
        var parts = _value.split('@');
        if ($.inArray(parts[1], arr) > 0 || _value == '') {
            console.log(_value + '　cant be accepted');
            return false;
        } else {
            console.log(_value + ' is GO!');
            return false; //do not submit just for the sake of example.
        }
    } else {
        console.log(_value + '　cant be accepted');
        return false;
    }
});

Check Fiddle

Answer 2

The email value you are comparing has more characters that what is needed for the inArray() method to work. It is not a direct comparison. You could do this. It gets everything after the '@' to compare in $.inArray.

$('#test').on('submit', function() {
    var _value = $('#mail').val();
    var _value2 = _value.split("@").pop();
    if( $.inArray(_value2, arr) > 0 || _value2 == '') {
        console.log(_value + '　cant be accepted');
        return false;
    } else {
        console.log(_value + ' is GO!');
        return false;//do not submit just for the sake of example.
    }
  });

Answer 3

You can use grep

var arr = [
    'aaa.ne.jp', 'bbb.net', 'ccc.co.uk', 'ddd.co.kr'];

$('#test').on('submit', function () {
    var _value = $('#mail').val(),
        _matches = $.grep(arr, function (val, i) { 
                       return _value.indexOf(val) != -1 
                   });

    if (_matches.length > 0) {
        //contains something
    } else {
        console.log(_value + '　cant be accepted');
        return false;
    }
});